US6857585B2 - Fuel-injector valve - Google Patents

Fuel-injector valve Download PDF

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Publication number
US6857585B2
US6857585B2 US10/204,613 US20461303A US6857585B2 US 6857585 B2 US6857585 B2 US 6857585B2 US 20461303 A US20461303 A US 20461303A US 6857585 B2 US6857585 B2 US 6857585B2
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United States
Prior art keywords
fuel injector
valve
swirl
bypass
fuel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related, expires
Application number
US10/204,613
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English (en)
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US20030155439A1 (en
Inventor
Hermann Winner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Robert Bosch GmbH
Original Assignee
Robert Bosch GmbH
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Filing date
Publication date
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Assigned to ROBERT BOSCH GMBH reassignment ROBERT BOSCH GMBH ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KEIM, NORBERT, HOHL, GUENTHER, YILDIRIM, FEVZI, HUEBEL, MICHAEL
Publication of US20030155439A1 publication Critical patent/US20030155439A1/en
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/162—Means to impart a whirling motion to fuel upstream or near discharging orifices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M51/00—Fuel-injection apparatus characterised by being operated electrically
    • F02M51/06—Injectors peculiar thereto with means directly operating the valve needle
    • F02M51/061—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means
    • F02M51/0625—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures
    • F02M51/0664—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding
    • F02M51/0671—Injectors peculiar thereto with means directly operating the valve needle using electromagnetic operating means characterised by arrangement of mobile armatures having a cylindrically or partly cylindrically shaped armature, e.g. entering the winding; having a plate-shaped or undulated armature entering the winding the armature having an elongated valve body attached thereto
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
    • F02M—SUPPLYING COMBUSTION ENGINES IN GENERAL WITH COMBUSTIBLE MIXTURES OR CONSTITUENTS THEREOF
    • F02M61/00—Fuel-injectors not provided for in groups F02M39/00 - F02M57/00 or F02M67/00
    • F02M61/16—Details not provided for in, or of interest apart from, the apparatus of groups F02M61/02 - F02M61/14
    • F02M61/18—Injection nozzles, e.g. having valve seats; Details of valve member seated ends, not otherwise provided for

Definitions

  • the present invention relates to a fuel injector.
  • a fuel injector for direct injection of fuel into the combustion chamber of a mixture-compressing, spark-ignited internal combustion engine which on the downstream end of the fuel injector has a guide and seat area which is formed from three disk-shaped elements is known from German Published Patent Application No. 197 36 682.
  • a swirl element is embedded between a guide element and a valve seat element.
  • the guide element guides an axially movable valve needle penetrating through it, while a valve closing section of the valve needle cooperates with a valve-seat surface of the valve seat element.
  • the swirl element has an inner opening area containing a plurality of swirl channels which are not connected to the outer periphery of the swirl element. The entire opening area extends fully over the axial thickness of the swirl element.
  • a particular disadvantage of the fuel injector known from the aforementioned document is the fixedly set swirl angle which cannot be adjusted to the different operating conditions of an internal combustion engine, such as partial load and full load operation.
  • cone opening angle a of the injected mixture cloud also cannot be adjusted to the different operating conditions, which in turn results in inhomogeneities during combustion, increased fuel consumption, as well as increased exhaust gas emission.
  • the fuel injector according to the present invention has the advantage over the related art that the swirl is adjustable as a function of the operating state of the fuel injector, whereby a jet pattern may be produced which is adapted to the operating state of the fuel injector, resulting in an optimization of the mixture formation and the combustion process.
  • the simple design of the swirl producing components is particularly advantageous over the conventional swirl preparation, because they are extended by an easily manufacturable bypass disk which is connectable to the valve needle.
  • the implementation of the measures according to the present invention is also advantageous in a fuel injector having continuous lift, because the desired modeling of the mixture cloud may be achieved in a simple manner using suitable geometry of the swirl channels.
  • FIG. 1 shows a partial axial section through a first exemplary embodiment of a fuel injector according to the present invention.
  • FIG. 2A shows an enlarged detail in area II of FIG. 1 , the fuel injector being illustrated in its closed state.
  • FIG. 2B shows an enlarged detail in area II of FIG. 1 , the fuel injector being illustrated in its opened state.
  • FIG. 3A shows a second exemplary embodiment of a fuel injector according to the present invention as the same detail illustration as in FIG. 2A , the fuel injector being illustrated in its closed state.
  • FIG. 3B shows a second exemplary embodiment of a fuel injector according to the present invention in the same way as in FIG. 2B , the fuel injector being in its opened state.
  • a first exemplary embodiment of a fuel injector 1 designed according to the present invention illustrated in FIG. 1 is used in particular for direct injection of fuel into the combustion chamber of a spark-ignited, mixture-compressing internal combustion engine.
  • Fuel injector 1 includes a solenoid 8 used as actuator 27 and is encapsulated in a coil housing 9 , a tubular internal pole 11 and an external pole 14 in the form of a sleeve, which is welded to nozzle body 2 .
  • An armature 12 is mechanically linked to valve needle 3 which is configured as valve-closure member 4 in the spray-discharge direction.
  • Valve-closure member 4 cooperates with valve-seat surface 6 , which is formed on a valve seat body 5 , to form a sealing seat.
  • This exemplary embodiment is an inwardly opening fuel injector 1 .
  • At least one spray-discharge orifice 7 is introduced in valve seat body 5 .
  • a swirl device 15 which includes a guide disk 16 , a bypass disk 17 and swirl channels 18 , is provided on the upstream side of the scaling seat. Swirl device 15 is explained in greater detail in the description of FIGS. 2A and 2B .
  • valve-closure member 4 In the idle state of fuel injector 1 , armature 12 is acted upon by restoring spring 10 against a lift direction in such a way that valve-closure member 4 is held on valve-seat surface 6 in a sealing position.
  • solenoid 8 When solenoid 8 is energized, it generates a magnetic field, which moves armature 12 against the elastic force of restoring spring I 0 in the lift direction. Armature 12 also entrains valve needle 3 in the lift direction.
  • Valve needle 3 and valve-closure member 4 which have a one-piece design in the exemplary embodiment, are lifted from valve-seat surface 6 , whereby bypass disk 17 , friction-locked to valve needle 3 via weld 21 , also moves in the lift direction, so that bypass channel 19 is opened.
  • Fuel is routed to the at least one spray-discharge orifice 7 through flow-through orifices 20 in guide disk 16 , as well as through bypass channel 19 and swirl channels 18 bypassing the sealing seat.
  • FIGS. 2A and 2B A detailed illustration of the procedure is provided by FIGS. 2A and 2B .
  • valve needle 3 being mechanically linked to armature 12 , moves against the lift direction, bypass disk 17 closes bypass channel 19 , valve-closure member 4 comes to rest on valve-seat surface 6 , and fuel injector 1 is closed.
  • FIG. 2A shows fuel injector 1 , designed according to the present invention, in its closed state in area II of FIG. 1 .
  • the enlarged illustration shows only those components which are relevant to the present invention.
  • the design of the remaining components may be identical with a known fuel injector 1 .
  • Elements already described are provided with the same reference symbols in all figures, so that a repeat description is unnecessary.
  • a mixture-compressing, spark-ignited engine has different requirements with regard to form, stoichiometry, and the penetration capability of the mixture cloud being injected into the combustion chamber in partial load operation as opposed to full load operation.
  • the mixture cloud should have a relatively small opening angle ⁇ , a great penetration capability, a narrow core area due to the small opening angle ⁇ , with a richer mixture, and a very lean envelope, while during full load operation a wide opening angle ⁇ and with it an almost homogeneous filling of the cylinder with ignitable mixture is present.
  • the modeling of the parameters of the mixture cloud may be facilitated by influencing the swirl through the above-described measures according to the present invention. If the fuel exits the spray-discharge orifice with little swirl, a mixture cloud having a small opening angle ⁇ is injected, while a strong swirl causes the jet to widen more and thus the mixture cloud to have a wide opening angle ⁇ .
  • the present invention is particularly advantageously applicable in connection with a fuel injector 1 having multi-stage lift or piezoelectric actuators 27 .
  • Swirl device 15 having a bypass channel 19 allows the fuel flow rate to be configured by swirl device 15 as a function of the lift of valve needle 3 of fuel injector 1 .
  • bypass channel 19 is closed, and thus the fuel may only flow through swirl channels 18 .
  • FIG. 2B shows fuel injector 1 according to the present invention in its opened state in the same detail as in FIG. 2 A.
  • valve needle 3 is raised in a lift direction against the flow direction of the fuel, whereby bypass disk 17 which is connected to valve needle 3 by weld 21 is also moved in the lift direction.
  • bypass disk 17 which is connected to valve needle 3 by weld 21 is also moved in the lift direction.
  • bypass channel 19 This results in the opening of bypass channel 19 , the amount of fuel that flows through depending on the axial position of valve needle 3 , i.e., on the distance of bypass disk 17 from an upstream side 22 of swirl channels 18 .
  • the fuel flows via flow-through orifices 20 in guide disk 16 to bypass channel 19 .
  • FIGS. 3A and 3B illustrate a second exemplary embodiment of fuel injector 1 according to the present invention using the same view as in FIGS. 2A and 2B .
  • Bypass disk 17 in the present second exemplary embodiment in contrast to the first exemplary embodiment illustrated in FIGS. 2A and 2B , is not connected to valve needle 3 by weld 21 or by pressure force, but is instead set on valve needle 3 in an axially movable manner.
  • Valve needle 3 has a catch 24 which is positively connected to valve needle 3 by weld 25 or by pressure force, etc. This design in particular is advantageously applicable in fuel injectors 1 having two-stage lifts.
  • bypass channel 19 is closed and fuel flows exclusively through swirl channels 18 .
  • valve needle 3 performs a partial lift which, for example, accompanies only a slight lift of bypass disk 17 via catch 24 or no lift at all of bypass disk 17 ; therefore the fuel has a strong tangential swirl component downstream from the sealing seat.
  • the present invention is not limited to the illustrated exemplary embodiments and it is particularly implementable in fuel injectors 1 having multi-stage lifts, in fuel injectors 1 having piezoelectric or magnetostrictive actuators 27 , and in any design variant of fuel injectors 1 .

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Fuel-Injection Apparatus (AREA)
US10/204,613 2000-12-19 2001-12-15 Fuel-injector valve Expired - Fee Related US6857585B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10063260.2 2000-12-19
DE10063260A DE10063260B4 (de) 2000-12-19 2000-12-19 Brennstoffeinspritzventil mit einstellbarem Drall
PCT/DE2001/004747 WO2002050426A1 (fr) 2000-12-19 2001-12-15 Soupape d'injection de carburant

Publications (2)

Publication Number Publication Date
US20030155439A1 US20030155439A1 (en) 2003-08-21
US6857585B2 true US6857585B2 (en) 2005-02-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
US10/204,613 Expired - Fee Related US6857585B2 (en) 2000-12-19 2001-12-15 Fuel-injector valve

Country Status (5)

Country Link
US (1) US6857585B2 (fr)
EP (1) EP1346147A1 (fr)
JP (1) JP2004516408A (fr)
DE (1) DE10063260B4 (fr)
WO (1) WO2002050426A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20070176132A1 (en) * 2006-01-24 2007-08-02 Mauro Grandi Valve Assembly For An Injection Valve And Injection Valve
US20080029067A1 (en) * 2004-07-01 2008-02-07 Friedrich Boecking Common Rail Injector
US20090175087A1 (en) * 2008-01-04 2009-07-09 Samsung Electronics Co., Ltd. Method of verifying programming operation of flash memory device
US20100314470A1 (en) * 2009-06-11 2010-12-16 Stanadyne Corporation Injector having swirl structure downstream of valve seat

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7155458B1 (en) * 2002-04-05 2006-12-26 Network Appliance, Inc. Mechanism for distributed atomic creation of client-private files
US7093776B2 (en) * 2004-06-29 2006-08-22 Delphi Technologies, Inc Fuel injector nozzle atomizer having individual passages for inward directed accelerated cross-flow
DE102005023793B4 (de) * 2005-05-19 2012-01-12 Ulrich Schmid Vorrichtung zur Drallerzeugung in einem Kraftstoffeinspritzventil
DE112007000209B4 (de) * 2006-01-27 2015-02-19 GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) Verfahren und Vorrichtung für eine Brennkraftmaschine mit Funkenzündung und Direkteinspritzung

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321900A (en) * 1979-10-12 1982-03-30 Toyota Jidosha Kogyo Kabushiki Kaisha Fuel injection type internal combustion engine
US5299919A (en) * 1991-11-01 1994-04-05 Paul Marius A Fuel injector system
US5392994A (en) * 1993-11-01 1995-02-28 General Motors Corporation Fuel injection nozzle
DE19736684A1 (de) 1997-08-22 1999-02-25 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19736682A1 (de) 1997-08-22 1999-02-25 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19915210A1 (de) 1999-04-03 2000-10-05 Bosch Gmbh Robert Brennstoffeinspritzventil

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6125818A (en) * 1997-03-19 2000-10-03 Hiatchi, Ltd. Fuel injector and internal combustion engine having the same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4321900A (en) * 1979-10-12 1982-03-30 Toyota Jidosha Kogyo Kabushiki Kaisha Fuel injection type internal combustion engine
US5299919A (en) * 1991-11-01 1994-04-05 Paul Marius A Fuel injector system
US5392994A (en) * 1993-11-01 1995-02-28 General Motors Corporation Fuel injection nozzle
DE19736684A1 (de) 1997-08-22 1999-02-25 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19736682A1 (de) 1997-08-22 1999-02-25 Bosch Gmbh Robert Brennstoffeinspritzventil
DE19915210A1 (de) 1999-04-03 2000-10-05 Bosch Gmbh Robert Brennstoffeinspritzventil

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080029067A1 (en) * 2004-07-01 2008-02-07 Friedrich Boecking Common Rail Injector
US7418949B2 (en) * 2004-07-01 2008-09-02 Robert Bosch Gmbh Common rail injector
US20070176132A1 (en) * 2006-01-24 2007-08-02 Mauro Grandi Valve Assembly For An Injection Valve And Injection Valve
US7607636B2 (en) * 2006-01-24 2009-10-27 Continental Automotive Gmbh Valve assembly for an injection valve and injection valve
US20090175087A1 (en) * 2008-01-04 2009-07-09 Samsung Electronics Co., Ltd. Method of verifying programming operation of flash memory device
US7907454B2 (en) * 2008-01-04 2011-03-15 Samsung Electronics Co., Ltd. Method of verifying programming operation of flash memory device
US20100314470A1 (en) * 2009-06-11 2010-12-16 Stanadyne Corporation Injector having swirl structure downstream of valve seat

Also Published As

Publication number Publication date
DE10063260B4 (de) 2007-11-29
US20030155439A1 (en) 2003-08-21
DE10063260A1 (de) 2002-07-11
EP1346147A1 (fr) 2003-09-24
JP2004516408A (ja) 2004-06-03
WO2002050426A1 (fr) 2002-06-27

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Owner name: ROBERT BOSCH GMBH, GERMANY

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YILDIRIM, FEVZI;HOHL, GUENTHER;HUEBEL, MICHAEL;AND OTHERS;REEL/FRAME:013838/0945;SIGNING DATES FROM 20020910 TO 20021001

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Effective date: 20130222